This article advocates for a dialogue about research traditions and paradigms within the community around New Interfaces for Musical Expression (NIME). Although the research community collectively values interdisciplinarity, the author argues that we have not done enough to acknowledge and account for the inevitable epistemological differences that emerge with disciplinary diversity. Over time, NIME has seen a rise in the proportion of technical reporting and a concomitant decline in practice-based research, which historically played a more central role. Exploration and explication of the values, assumptions, and expectations that circumscribe legitimacy in practice-based research are needed in order to maintain and advocate for its relevance.